What is Earthquake?

         Earthquake is a vibration that can be feel on the surface of the earth because movement, especially from within the layers of the earth. The earthquake was tectonic plate activity that often occurs. If all shocks ranging from weak to strong is calculated, the earthquake occurred about a million times each year. There are three main types of earthquake, namely tectonic earthquake, volcanic earthquake and debris earthquake.

Tectonic Earthquake

        Tectonic earthquake is an earthquake coused by seismic movement that occurs in the within skin of earth, such as fault or displacement. According to the theory of plate tectonics, the tectonic quake's epicenter located at subduction zones, namely a meeting between the continental plates and oceanic plates. Front edge of the plate into the bottom of the ocean continental plates.

Volcanic Earthquake

       Volcanic earthquake is an earthquake coused by eruption or crack which occur within the structure of volcanoes. Volcanic earthquake accur because magma upward through the earth’s crust. Volcanic earthquake are feel in the around of the volcano, but the effect is not feel at long distances.

Debris Earthquake

         Debris earthquake is an earthquake caused by the avalanches of rock mass, for example, from the slopes of the mountains or from the top side of the cave, and the presence of landslides. The intensity of the debris earthquake is very small so it does not seem at long distances. Debris earthquake is also called the Terban earthquake

     

        This is the basic grouping of types of earthquake based on the coused. However these three destructive earthquake if the intensity of earthquake large.